Hi, Following patches add support for paravirtualized guest on mips (mips_paravirt). Some of the patches add basic support to run it on octeon3. The core of mips_paravirt is David's work. I rebased his code, rearranged it somewhat (e.g. split it into the current patches) and added some minor modifications. I've run it using lkvm on a host with KVM MIPS-VZ support (on octeon3). I've tested guest kernels built for CPU_MIPS64_R2 and CPU_MIPS32_R2. When the guest kernel is built for CPU_CAVIUM_OCTEON it requires an additional patch to avoid usage of octeon_send_ipi_single in octeon_flush_icache_all_cores. Latest patch for this is not yet included as it caused a regression and needs some rework. To built a mips_paravirt guest kernel it's easiest to start with mips_paravirt_defconfig, check/modify CPU selection (defconfig has CPU_MIPS64_R2), and kick off kernel built. Patches are against v3.15-rc5. Diffstat is arch/mips/Kbuild.platforms | 1 + arch/mips/Kconfig | 30 +- arch/mips/cavium-octeon/Kconfig | 30 +- arch/mips/configs/mips_paravirt_defconfig | 1521 ++++++++++++++++++++ arch/mips/include/asm/cpu-features.h | 9 +- arch/mips/include/asm/cpu-type.h | 1 + .../asm/mach-cavium-octeon/cpu-feature-overrides.h | 1 - .../asm/mach-paravirt/cpu-feature-overrides.h | 36 + arch/mips/include/asm/mach-paravirt/irq.h | 19 + .../include/asm/mach-paravirt/kernel-entry-init.h | 49 + arch/mips/include/asm/mach-paravirt/war.h | 25 + arch/mips/include/asm/mipsregs.h | 72 + arch/mips/include/asm/r4kcache.h | 2 + arch/mips/kernel/Makefile | 2 +- arch/mips/kernel/branch.c | 6 +- arch/mips/kernel/octeon_switch.S | 84 +- arch/mips/kernel/r4k_switch.S | 3 + arch/mips/math-emu/cp1emu.c | 12 +- arch/mips/mm/c-r4k.c | 32 + arch/mips/mm/tlbex.c | 8 +- arch/mips/paravirt/Kconfig | 6 + arch/mips/paravirt/Makefile | 14 + arch/mips/paravirt/Platform | 9 + arch/mips/paravirt/paravirt-irq.c | 388 +++++ arch/mips/paravirt/paravirt-smp.c | 149 ++ arch/mips/paravirt/serial.c | 38 + arch/mips/paravirt/setup.c | 67 + arch/mips/pci/Makefile | 2 +- arch/mips/pci/pci-virtio-guest.c | 140 ++ 29 files changed, 2709 insertions(+), 47 deletions(-) Comments are welcome. Thanks, Andreas
